Fix usage of Thread.handle_interrupt in MonitorMixin#mon_synchronize
Fix usage of Thread.handle_interrupt in MonitorMixin#mon_synchronize

* See https://bugs.ruby-lang.org/issues/17669
  and https://github.com/ruby/monitor/issues/2
  and https://github.com/jruby/jruby/issues/6526

nobu/rubyspec,nobu/rubyspec,ruby/spec,nobu/rubyspec,ruby/spec,ruby/spec